Nitrates should be less than 10ppm.... I would say that most will say that its too soon.. IMO
you should wait at least 6 months... However I bought fully cured LR
and it too the tank 1 week to cycle with no spike at all after adding fish so I figured I would add a Coral My tank has been setup for a month... doing fine and all.. but i would wait for about 4-6 months... Btw the person I got the LR
from stated that he has had ppl buy the rock and add corals and such the same day without problems and well i trust him..